No, it's not confirmed. There is no official statement.
Previous history of nVidia is known to ignore aging technology. They are very quick to release stable drivers (way ahead of ATI) and update often as long as product is on sale. Once product hits end of life nVidia does not provide low level API updates (usually part of BIOS) and video cards become unstable with newer OSes and drivers. This is all from PNY LVL3 tech support person. I had an email exchange with PNY support team trying to get my old cards to work.
I was told that low level API source code is not released, but rather provided as a library and if there are no updates directly from nVidia there is not much you can do. Unless someone big twists nVidia's arm and pushes them for source code or update for ICS there won't be one.